Here’s a photo that’s supposed to be a 1949 Hiawatha. Very close, but not identical to yours:
https://www.pinterest.com/pin/49-hiawatha-5hp–822399581927125629/
(more lines on the cowl, and lines on throttle lever).
Here’s a Sea Bee running:
https://www.youtube.com/watch?v=l2WmgeyOHyA
And some photos (of a later, reversible?):
https://www.aomci.org/forums/topic/goodyear-sea-bee-2/
http://www.omc-boats.org
http://www.aerocraft-boats.org
